Gmail (and other google hosted mail) delivery issues

CS // 29 Apr 2015 // Comments Off on Gmail (and other google hosted mail) delivery issues

Update

Google has added another MX (mail server) for Google Hosted mail – alt4.gmail-smtp-in.l.google.com.

This does not currently appear to be blocked (unlike their other 4 MX servers), so we have removed the forwarding, and mail is transiting normally.

China has completely blocked gmail hosted mail as of today [28th April 2015]

This means that all mails heading to google’s servers is now blocked from Chinese ISP’s like ourselves.

Symptoms will include bounce messages where our server has given up retrying to send out the mail, as the remote server is not accessible over the Chinese internet.

EG –

Hi. This is the qmail-send program at mail.computersolutions.cn.
I’m afraid I wasn’t able to deliver your message to the following addresses.
This is a permanent error; I’ve given up. Sorry it didn’t work out.

:
Sorry, I wasn’t able to establish an SMTP connection. (#4.4.1)
I’m not going to try again; this message has been in the queue too long.

In the interim, we have added forwarding for all gmail addressed mail to transit through our oversea’s mail servers in the USA.

This should solve email delivery issues for gmail addresses – essentially anything addressed to someone @gmail.com

We are looking at solutions for resolving delivery to other google hosted mail clients, this will take some time to come up with a usable solution. In the interim, we can manually add routes on a server by server basis.

Be aware that this specific issue is out of our control, and we can only mitigate against it.

Examples of google hosted mail clients from recent queries/failure notices:

teamsequel.com – Their mail is served by google.

dig mx teamsequel.com

; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> mx teamsequel.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11757 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 2, ADDITIONAL: 0 ;; QUESTION SECTION: ;teamsequel.com. IN MX ;; ANSWER SECTION: teamsequel.com. 2320 IN MX 5 ALT1.ASPMX.L.GOOGLE.com. teamsequel.com. 2320 IN MX 5 ALT2.ASPMX.L.GOOGLE.com. teamsequel.com. 2320 IN MX 10 ALT3.ASPMX.L.GOOGLE.com. teamsequel.com. 2320 IN MX 10 ALT4.ASPMX.L.GOOGLE.com. teamsequel.com. 2320 IN MX 1 ASPMX.L.GOOGLE.com.

dreamonproductions.com – their mail is served by google.

dig mx dreamonproductions.com

; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> mx dreamonproductions.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35828 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;dreamonproductions.com. IN MX ;; ANSWER SECTION: dreamonproductions.com. 3600 IN MX 5 alt1.aspmx.l.google.com. dreamonproductions.com. 3600 IN MX 1 aspmx.l.google.com. dreamonproductions.com. 3600 IN MX 10 aspmx2.googlemail.com. dreamonproductions.com. 3600 IN MX 5 alt2.aspmx.l.google.com. dreamonproductions.com. 3600 IN MX 10 aspmx3.googlemail.com.